In a blueprint folder hierarchy, the contents of templates shadows the hierarchy. Ultimately, I'd like to Mirror the hierarchy of blueprint templates in blueprint static? Add a url_prefix to the blueprint which applies to templates and static, From the folder hierachy displayed below, ./subfiles/auth contains: ./subfiles/auth/templates/auth/register.html ./subfiles/auth/static/auth/register.js (Note the addition of auth after static.) Issue: Even without the url_prefix: # auth.py @auth_bp.route("/auth/register", methods=["GET", "POST"]) def register(): # [...] return render_template(f"{request.path[1:]}.html") <!-- register.html --> <!-- [...] --> <script src="{{ url_for( request.blueprint + ".static", filename=request.path[1:] + ".js") }}"></script> results in: GET http://127.0.0.1:5000/static/auth/register.js net::ERR_ABORTED 404 (NOT FOUND) whereas: <!-- register.html --> <!-- [...] --> <p>{{ url_for( request.blueprint + ".static", filename=request.path[1:] + ".js") }}</p> results in: /static/auth/register.js That should be correct, although I have a feeling that it is looking at the root level ./static rather than in ./subfiles/auth/static/. Folder Hierarchy: % tree -I '__pycache__' . ├── app.py ├── app.sh ├── blueprints_init.py ├── config.py ├── global_fun.py ├── pielection.db ├── pielection.sql ├── readme.txt ├── requirements.txt ├── static │ ├── brand.png │ └── styles.css ├── subfiles │ ├── __init__.py │ ├── auth │ │ ├── __init__.py │ │ ├── auth_fun.py │ │ ├── auth_rt.py │ │ ├── static │ │ │ └── auth │ │ │ └── register.js │ │ └── templates │ │ └── auth │ │ ├── account.html │ │ ├── login.html │ │ └── register.html └── templates ├── apology.html ├── layout.html └── layoutmwe.html Continue reading...